Scripture doesn't just shape the life of the community of faith. It also has a powerful effect on the lives of those who maintain distance from traditional religion, even those who explicitly deny religious faith.
This Sunday is Trinity Sunday, which is appropriately observed after Pentecost and the coming of the Holy Spirit. It is important that we not treat the Trinity as an appendix to the Christian doctrine of God, which is the unfortunate legacy of too much twentieth century theology. The Trinity is the Christian doctrine of God.